Valve for hot-blast



(No Model J. KENNEDY.

VALVE FoRHoT BLAST sToVEs.

No. 478,610. Patented July 1 2, 1892.

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UNITED STATES PATENT OFFICE.

JULIAN KENNEDY, OF LATROBE, PENNSYLVANIA.

VALVE FOR HOT-BLAST` STOVES.

SPECIFICATION forming part of Letters Patent No. 478,610, dated July 12, 1892.

Application filed December 17. 1891. Serial No. 415,366. (No model.)

To all whom it may concern:

Be it known that I, JULIAN KENNEDY, of Latrobe, in the county of lVestrnoreland and State of Pennsylvania, have invented a new and useful Improvement in Valves for Hot- Blast Stoves, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, which shows in vertical cetral section a part of the chimney-line, together with the valve and Valve-seat, and illustrates my improvement.

The object of my invention is to improve the construction of the chimney-flue valve and valve-seat of hot-blast stoves and similar furnaces and to render these parts more durable and eliicient.

In the drawing, 2 represents part ot the wall of a hot-blast stove.

3 is the chimney-Hue, having an outer metal casingx and an inner masonry lining fl.

5 is the valve, which operates vertically in connection with aValve-seat 6 to close and open the Hue. The valve-seat consists of an annular casting, which is secured to the shell of theloWer portion of the line and is provided With upwardly-projecting annular tlan ges b c, forming a circular gutter 7. The upper section of the chimney-flue, which is of smaller diameter than the lower section, tits on the seat Within the inner annular flange c, and its shell is'fixed thereto. Y

8 is a water-supply pipe, which discharges into the gutter '7, and 9 is an outlet-pipe, by which the Water after ilowing through the gutter is led oft to a suitable place of discharge. By maintaining` a current of Water through this gutter the valve-seat casting is cooled eftectually without the expense and inconvenience which attend casting the seat with Water-cooling pipes or coils. The valve 5 is suspended by a link 10 from a lever 11, which extends through vthe wall of the flue and is -pivoted at 12 and provided with a counter-Weight 13. Part of this leveris curved or bent vertically, as shown, and the weight and position of the counter-Weight are so determined relatively to the Weight of the valve that when the valve is seated, as shown by full lines, the leverage is sufficient to hold it to its seat, and When the lever is moved, as shown by dotted lines, to unseat the valve the distance-between the inner end of the lever and the vertical plane of the pivot is relatively greater than the distance of the counter-weight from such plane and the valve will remain open of itself. I do not claim herein the arrangement and construction of this valve-lever.

I claim- 1. The combination, with a furnace-Hue, of an annular valve-seat casting having lianges affording an outer water-gutter fixed to the sections of the flue, substantially as and for the purposes described.

2. The combination, with afurnace-ue, of an annular `valve-seat casting fixed to one of the tluesections and having upright anges b c, forming an outer water-gutter, the flange c encircling and fixed to a second narrower section of the flue, substantially as and for the purposes described.

In testimony whereof I have hereunto set my hand this 11th day ot December, A. D. 1891.

JULIAN KENNEDY.

Witnesses: l

ALBERT A. HEINER, THOMAS W. BAKEWELL. 

